57results about "Hammer drives" patented technology

The underlying invention relates particularly to a hydraulic forming machine, more particularly a forging hammer, for workpiece forming, comprising a hydraulic cylinder for driving a ram configured for workpiece forming, and a hydraulic circuit configured for operation of the hydraulic cylinder, wherein the hydraulic circuit has an actuator with an adjustably variable volume flow via which a first hydraulic working chamber of the hydraulic cylinder, used to accelerate the ram during the execution of a working stroke (A) for workpiece forming, can be provided with hydraulic fluid. The hydraulic circuit is configured to adjust and vary the volume flow of the valve or actuator, depending on a setpoint speed (Vsoll) of the ram to be achieved in an acceleration phase of a working stroke (A), and to optimize the subsequent movement phase.

The invention belongs to the technical field of forging equipment, particularly relates to a hollow variable-cross-section oil cylinder connecting piece preparation process and a forging device thereof, and aims to solve the problems of non-uniform blank stress, low punching efficiency, unsafety and inconvenience in blank taking in traditional forging. The technical scheme is as follows: a forging hammer drives a rack through a bearing plate, and a forging table rotates through a gear, a bevel gear ring and the like; the blank is uniformly stressed to finish upsetting; the electromagnet controls the pin rod to enable the nut block to rotate, and the push column is driven to move upwards to be matched with the forging hammer for punching. By means of the device, the blank can be evenly forged, automatic punching can be achieved, the blank can be conveniently taken out, the forging quality and efficiency of the hollow variable-cross-section oil cylinder connecting piece are improved, and the safety of workers is guaranteed.

The invention relates to the technical field of steel ingot through forging, in particular to a large-section steel ingot diameter forging four-hammerhead intelligent cooperative deformation and through forging control method. The method comprises the following steps: acquiring pressure data of each hammer head in a steel ingot forging process and hammer falling duration from falling to contacting with a steel ingot; according to the pressure data difference and the drop hammer duration difference of the symmetric hammer heads under the same dislocation forging frequency, evaluating the symmetric hammer pressure unbalance of each dislocation forging; according to the hammer drop duration, the pressure data and the symmetrical hammer pressure unbalance of each staggered forging of each hammer head, the forging ideal degree of each staggered forging of each hammer head is obtained; according to the dislocation influence condition between the hammer heads and the forging ideality difference of the adjacent hammer heads, the dislocation pressure adjusting factor of each time of dislocation forging of each hammer head is determined; and the dislocation pressure adjusting factor is utilized to obtain the drop hammer force adjusting weight of each hammer head, and then the pressure of each hammer head during next forging is regulated and controlled. The forging effect of the large-section steel ingot is improved.

The invention relates to the technical field of pulverizer blades, in particular to pulverizer blade forging equipment which comprises a supporting seat, a supporting rod is fixedly connected to the surface of the supporting seat, a top plate is fixedly connected to the top of the supporting rod, a lower die is fixedly connected to the surface of the supporting seat, and a forging hammer is arranged at the top of the lower die. The forging hammer is located at the bottom of the top plate. An impact mechanism, a pushing mechanism and a jacking mechanism are arranged on the surface of the top plate; the impact mechanism comprises a rotating disc and a first connecting plate. A first rotating rod drives a rotating disc to rotate, a first connecting block and a movable rod rotate along with the rotating disc, a first movable groove is formed, the movable rod can drive a first connecting plate to vertically move on the inner side of a top plate, and then lifting of a forging hammer can be achieved; and through the lifting effect of the forging hammer, a workpiece on the lower die can be conveniently impacted, so that the crushing machine blade can be forged.

The utility model relates to the technical field of air forging hammer forging supporting, in particular to an air forging hammer forging supporting device which comprises a machine base, a forging hammer machine and a forging table are connected to the machine base, a mounting plate is arranged on the machine base in a sliding mode, a first driving mechanism is arranged on the machine base, and a first mounting base is connected to the mounting plate. A second mounting seat is connected to the first mounting seat, a rotating disc is rotatably connected between the first mounting seat and the second mounting seat, a rotating mechanism is arranged on the mounting plate, a first movable plate and a second movable plate are slidably arranged on the rotating disc, a second driving mechanism is arranged on the rotating disc, and grooves are formed in the first movable plate and the second movable plate; the grooves are located in the opposite side walls of the first movable plate and the second movable plate, and clamping plates are connected into the grooves and are right-angle plates. The supporting device has the function of solving the problems that a workpiece needs to penetrate through the space between the two clamping parts of the supporting device, so that operation of workers is inconvenient, and danger exists.

The invention discloses a precision forging device and a working method thereof, and relates to the technical field of precision forging devices.The precision forging device comprises a mounting rail, a feeding mechanism, a clamping assembly, a forging assembly, a cleaning assembly and a lifting sensing assembly. The feeding mechanism drives the blank to move and rotate in the forging furnace; the lifting sensing assembly detects the position of the blank, the forging mechanism is controlled to only forge the middle high-temperature area of the blank, and cracks in the end low-temperature area are avoided; the cleaning assembly automatically removes surface waste residues in the forging process. The alarm system monitors the forging quality in real time. Automatic and precise forging of blanks is achieved, the forging quality and the material utilization rate are remarkably improved, and the precise forging device has the advantages of being reasonable in structure, convenient and fast to operate, easy to maintain, wide in adaptability and the like and is suitable for precise forging production of high-precision metal parts.

The invention relates to a method for forging a forged workpiece (2) in a forging press (3), preferably designed as an open die forging press or a radial forging press, the method comprising manipulating the forged workpiece (2) by means of a workpiece manipulator (1) having a workpiece clamp (5), the workpiece clamp (5) having a chuck (6), the chuck defines a clamping axis (S) for the forging workpiece (2), and wherein the workpiece manipulator (1) performs a linear translational movement together with the forging workpiece between the stamping strokes of the forging press (3), the method further comprises determining the position of at least one end (4) of the forged workpiece (2) clamped into the workpiece clamp (5) on the clamping axis (S) relative to a reference point on the forging press (3), in particular relative to a mold of the forging press (3), by means of at least one measuring system arranged on the workpiece clamp (5) or on the workpiece clamp (5). The invention also relates to a workpiece manipulator (1) for the method according to the invention.

The present application relates to the technical field of ingot forging, and particularly relates to a large-section ingot diameter forging four-hammer-head intelligent collaborative deformation and forging penetration control method. The method comprises the following steps: obtaining pressure data of each hammer head in the ingot forging process and hammer drop duration from falling to contacting the ingot; evaluating the symmetric hammer pressure imbalance of each staggered forging according to the pressure data difference and hammer drop duration difference of the symmetric hammer heads under the same staggered forging frequency; obtaining the forging ideal degree of each staggered forging of each hammer head according to the hammer drop duration, pressure data and symmetric hammer pressure imbalance of each staggered forging of each hammer head; determining the staggered pressure adjustment factor of each staggered forging of each hammer head according to the staggered influence between the hammer heads and the difference between the forging ideal degrees of the adjacent hammer heads; and obtaining the hammer force adjustment weight of each hammer head by using the staggered pressure adjustment factor, so as to regulate the pressure of each hammer head in the next forging. The present application improves the forging effect of the large-section ingot.

The utility model discloses a rotary swaging mechanism for tungsten alloy bars, and relates to the technical field of metal processing equipment. Comprising a processing seat which is provided with a drum, a positioning groove and a limiting frame, and a forging hammer part is arranged on the opening side of the drum. And the clamping part in the rotary drum forms an elastic clamping structure by utilizing an inserting barrel, a sliding rod, a clamping arc plate, an outer plate and an extension spring so as to clamp the tungsten alloy bar. The driving component adopts a speed reducing motor as a power source, and the rotating drum and the forging hammer shaft are driven to rotate through meshing transmission of an incomplete gear on a driving shaft and a first straight gear and meshing transmission of a third straight gear and a second straight gear. During operation, the gear motor drives the driving shaft, so that the rotating drum rotates to drive bars to rotate intermittently, and meanwhile, the forging hammer shaft drives the hammer to continuously forge the bars. Integration of a tungsten alloy bar rotating procedure and a forging hammer procedure is achieved through a single power source.

The invention discloses a metal forging system and method based on electromagnetic or mechanical driving and closed force flow. The system comprises a rigid force bearing frame, a power acceleration device, a kinetic energy hammer and a position recovery device, the power acceleration device is used for driving the kinetic energy hammer to impact a workpiece fixed on a frame forging station, and the force bearing frame is of a closed structure and is used for forming a closed-loop force flow by acting force and counter-acting force generated by forging impact inside; the position recovery device is configured in a transient pulse power mode or a continuous power mode to accommodate a microgravity or ground environment. The system may optionally be integrated with a scrap management unit. The problems of recoil force management, efficient reset, waste chip treatment and equipment light weight in space forging are solved.

The present application belongs to the technical field of radial forging machine control, and specifically relates to a high-precision radial forging machine control system and a control method thereof, which comprises the following steps: establishing a process parameter database, synchronously collecting dynamic parameters of a forging process through a multi-source heterogeneous sensor, acquiring a workpiece surface temperature field distribution through an infrared thermal imager, measuring a radial deformation amount through a laser displacement sensor group, and capturing material internal defect features through an acoustic emission sensor; calculating an optimal forging frequency according to real-time material rheological characteristics, generating a hammer head motion trajectory correction amount through a model predictive control algorithm; implementing dynamic compensation control, adjusting a hydraulic system back pressure through strain rate feedback, executing closed-loop quality evaluation, performing online metallographic analysis during a forging intermittent period, reversely correcting process parameters according to a grain size detection result, and predicting a workpiece fatigue life based on a digital twin model; and the present application has real-time dynamic control over the entire forging process, effectively eliminates errors and deviations, and leads to the effect of improving forging precision.

The invention discloses a precision forging mechanism and a precision forging method thereof, and relates to the technical field of forging mechanisms, and the precision forging mechanism comprises a forging furnace, a forging mechanism, a cleaning assembly, a lifting sensing assembly and a master control system. The forging mechanism adopts a hydraulic telescopic cylinder to drive a hammering head, and dust is effectively isolated through a telescopic protective sleeve, so that a hydraulic system is prevented from being polluted and leaked. The cleaning assembly automatically blows away oxide skin and impurities on the surface of the forge piece through forging reciprocating motion, and the surface quality is improved. The lifting sensing assembly and the master controller cooperate to automatically recognize a blank temperature suitable section, the forging area is accurately controlled, and cracks generated at the low-temperature end during forging are avoided. The system also has real-time quality detection and alarm functions, and supports defect remelting and rerepairing. The mechanism has multiple functions of automatic forging, on-line cleaning, intelligent quality control and high-temperature protection, the consistency of forgings, the material utilization rate and the production efficiency are remarkably improved, and the mechanism is suitable for automatic precision forging production of high-precision forgings.

The invention relates to the technical field of alloy forging, in particular to alloy workpiece forging forming equipment. According to the technical scheme, the forging machine comprises a rack, a forging base table and a shell, the forging base table and the shell are installed on the rack, a driving assembly and a forging assembly are arranged on the rack, and the forging machine further comprises a transmission assembly connected to the forging assembly; the guide assembly is arranged in the shell and is connected with the forging assembly through the transmission assembly; the mounting assembly is connected with the rack through a reset assembly and is movably connected with the guide assembly; the cleaning assembly is mounted on the mounting assembly through a rotating assembly; the air supply assembly is connected with the guide assembly and the cleaning assembly. The cleaning structure is driven in a linkage mode through the forging action, cooperative linkage of cleaning and forging operation is achieved, an additional power source is not needed, the structure is compact, the problem that oxide skin cannot be cleaned in time in the forging process is solved, and the forging quality and efficiency are improved.

This invention relates to the field of forging control technology, specifically to an intelligent forging collaborative control system for tension clamps. This system uses an acoustic multimodal sensing module to perform full-band coupling analysis of the acoustic signal from the forging, simultaneously generating material grain boundary slip characteristics and a three-dimensional temperature field distribution map. It then uses the spatial distribution law of the slip characteristics to correct local distortions in the temperature field. A phase transformation prediction and decision module converts the corrected temperature field into a thermally activated energy field, couples the grain boundary slip characteristics to construct a grain boundary dynamic recombination response network, and outputs a pressure peak floating threshold and a temperature maintenance window that adaptively adjust with the phase transformation state. A cross-domain collaborative execution module constructs a dual-track drive mechanism in the forging circuit. The main drive track plans the forging hammer stroke curve based on the pressure peak floating threshold, while the secondary feedback track converts the grain boundary slip characteristics into a dynamic correction factor to adjust the impact energy gradient. A window adaptive strategy is implemented in the temperature circuit to achieve efficient focusing of energy in the superplastic deformation zone.

The utility model discloses a hydraulic hammer cold forging device in the related technical field of cold forging, which comprises a main frame and a support box seat I. A movable sliding chute is arranged in the middle of the main frame along the length direction, and a support box seat II is arranged on one side of the movable sliding chute far away from the support box seat I; a guide sliding groove is formed in the side face of the side, close to the movable sliding groove, of the first supporting box base, a sliding base is slidably connected and installed in the guide sliding groove, a hydraulic forging hammer is installed in the sliding base, and an installation groove is formed in the side face of the side, close to the movable sliding groove, of the second supporting box base. A plurality of cold forging stations are arranged on the main machine frame, the supporting blocks can be driven to move through the transmission lead screws among the stations, products can move among the stations, the cold forging machining process is simplified, cold forging multi-procedure machining of the products is achieved, the auxiliary time of procedure circulation and clamping is effectively shortened, and the cold forging machining efficiency is improved.

The utility model discloses an ultra-fine grain semi-high speed steel cold roll blank forging device which comprises a forging machine frame, an air cylinder is fixedly installed at the top end of the forging machine frame, a base is integrally and fixedly installed at the bottom of the forging machine frame, anvil blocks are installed in the base at equal intervals in a sliding mode, and a hammer head is installed at the movable end of the air cylinder. An anvil block and a hammer head with specific sizes are selected according to the size of a to-be-machined cold roll, the anvil block slides to the position below the air cylinder along the interior of the base, the position of the anvil block is fixed, then the hammer head and the mounting plate are fixedly mounted, and when a cold roll blank is forged, the end of the cold roll blank is arranged in the shaping hole, so that the end of the cold roll blank is fixed. According to the cold roll forging device, the end size of a cold roll can be accurately forged, the forging efficiency of an ultra-fine grain semi-high-speed steel cold roll blank is improved, when cold rolls of different sizes are forged, proper anvil blocks and hammer heads are replaced, the cold rolls of different sizes can be forged, and the use range of the device is widened.

The present application relates to flange forging platform technical field, specifically is a kind of self-clamping transposition machine tool spindle flange forging platform and its transposition method, including the platform being arranged on the frame, the upper portion of platform is provided with holder, holder is provided with the forging hammer for being used to the flange of main shaft is forged, first spindle is rotatably arranged on the frame, first spindle is cooperated with holder by first linkage mechanism, first spindle rotates while driving holder vertically moves up and down to drive forging hammer vertically reciprocating moves up and down;Slot is rotatably arranged on the platform, a plurality of arc-shaped clamps are arranged on the slot at equiangular circumferential distribution, a plurality of arc-shaped clamps can be synchronized to expand or gather to clamp and fix the flange of main shaft placed on the slot, the present application adopts the way of circumferential clamping and can be fixed in all directions to workpiece, can be adapted to different diameter flange simultaneously, need not frequently change clamp, in addition, by intermittent automatic rotation workpiece, ensure forging quality, efficiency is high.

The utility model discloses a horizontal radial forging machine, which relates to the technical field of radial forging equipment and comprises a shell, a hammer seat and a hammer head, baffles are connected to two sides and the outer surface of the hammer seat, bolts penetrate through two sides of the baffles, threaded sleeves are fixed outside the bolts, and the top of the hammer head is respectively connected with a limiting block and a supporting block. Through the arrangement of the plug pin, the threaded sleeve, the limiting block and the supporting block, the limiting block and the supporting block are inserted into the hammer seat, then the plug pin transversely penetrates through the hammer seat, and the threaded sleeve is connected with the limiting block by rotating the plug pin so as to limit the limiting block, so that the installation operation is completed; the limiting block is matched with the supporting block to prevent the hammer from moving up, down, left, right and backward and falling off, the bolt is matched with the threaded sleeve to prevent the hammer from falling off forwards, and rapid installation is facilitated; during dismounting, the bolt is rotated reversely, so that the threaded sleeve is separated from the limiting block, and then the bolt is pulled out, so that the hammer head can be directly taken down from the hammer seat; the structure is simple, and dismounting is fast and convenient.

The invention belongs to the technical field of forge piece machining, and particularly relates to a forging process of a stainless steel high-complexity-coefficient forge piece, which comprises the following working procedures of blanking, heating, upsetting, pre-forging, finish forging, punching and trimming, heat treatment, shot blasting, flaw detection, surface treatment, inspection and warehousing, the temperature of the blank is controlled to be 1100-1150 DEG C; the upsetting procedure comprises pre-upsetting and secondary upsetting, in the pre-upsetting procedure, part of blanks are accumulated at the bottom, and part of cavities of the blanks which do not need to be upset are arranged on an upper die; in the pre-forging process, the draft angle of a pre-forging die is increased to 8-10 degrees, and the fillet radius is increased to 15-20 mm; in the finish forging process, a composite release agent of plant ash and nano silicon dioxide is spread on the surface of the forge piece before finish forging, the problems of insufficient mold filling, mold sticking scrapping, out-of-tolerance deformation and the like in traditional forging are solved, the qualified rate of finished products is greatly increased, and the method is suitable for large-scale production of the high-complexity-coefficient stainless steel forge piece.

The utility model relates to the technical field of metal hammering, in particular to a hammering device for metal smelting processing, which comprises an air hammer body, a base, a limiting seat, a sliding structure and a clamping structure, the bottom of the base is fixedly connected with the limiting seat, the limiting seat is clamped with the bottom of the air hammer body, and the sliding structure comprises a threaded rod I and a supporting plate. The right end of the base is in threaded connection with a first threaded rod, the bottom of the supporting plate is fixedly connected with a sliding block, the top end of the base is slidably connected with the sliding block, the top of the supporting plate is fixedly connected with a hammering table, the clamping structure comprises fixing plates, and the left end and the right end of the top of the supporting plate are fixedly connected with the fixing plates; the fixing plate is in threaded connection with a second threaded rod, and the side, close to the middle, of the second threaded rod is rotationally connected with a clamping plate. The clamping device is provided with a clamping structure, workpieces of different sizes can be clamped, manual clamping by operators is not needed, errors caused by manual operation are reduced, and use is rapid and convenient.

The invention discloses a module combined type four-hammerhead radial forging machine. The module combined type four-hammerhead radial forging machine comprises a power unit, a semi-open type gearbox, a split type forging box and an executing mechanism. Through series connection design of half-open gear box unit tooth systems, one set of power input and four-shaft synchronous output can be achieved, a forging executing mechanism in a forging box is driven, and four-direction high-frequency radial forging is achieved. Due to the semi-open design, the convenience of installation, inspection and maintenance is improved; the unit box body frame of the forging box adopts a split nesting principle, so that compared with the traditional casting and welding box body, the processing difficulty, precision, quality and cost are effectively improved, and the operation and maintenance difficulty is reduced. And a telescopic heat insulation protection device is arranged, so that the guiding durability of the hammer rod is improved. In addition, rectangular threads are adopted for hammer rod connection of the forging executing mechanism, the position in the forging process is reliable, the meshing length can be adjusted, the forging range can be adjusted, and the application range is greatly widened.

An impact tool includes a cylindrical body having an internal chamber, a piston assembly positioned within the internal chamber, the piston assembly having a piston base and a piston rod, an adapter arranged on the cylindrical body and having external threads, and a location tip assembly having an opening and having internal threads couplable to the adapter by engaging the external threads relative to the internal threads to create a threaded connection, the threaded connection allows the location tip assembly to be moved axially to a selectable height. An impact tip coupled to an end of the piston rod. Upon introduction of pressurized air within the internal chamber, the piston assembly moves axially towards the adapter causing the impact tip to move axially through the opening towards a surface resulting in impact with the surface to be dented.

A method for radial forging a workpiece from an initial state to an end state, preferably follows a pass schedule multiple times from an initial state to an end state, by means of a radial forging machine with forging tools, preferably four forging tools, arranged around the periphery of the workpiece. The radial forging machine is designed and configured to perform the radial forging in at least three modes of operation, A) radial forging in spiral mode, B) radial forging in straight mode and C) radial forging in flat mode. The shaping of the workpiece from an initial state to an end state is a sequence of radial forging passes. At least two of the three different modes of operation are applied in succession.

The utility model relates to the field of forging hammering technology, and disclose a kind of forging heat treatment hammering device, including base, the upper surface of base is fixedly connected with bearing table, base upper surface and located bearing table one side fixedly connected with shell, the top of shell is fixedly connected with oil cylinder, the output end of oil cylinder is fixedly connected with hammering hammer, the both sides of shell are all set with sliding mouth, two The sliding mouth in all slidingly connected with I-shaped sliding block, the opposite side of two The I-shaped sliding block is fixedly connected with connecting rod, and the one end of two The connecting rod is equipped with the protective cover for blocking splashing. The utility model can effectively intercept high-speed splashing debris, prevent it from splashing into the eyes or skin of operator, thereby effectively avoiding the operator being scalded or scratched, and adapting to different height forgings, while placing the forging before forging, the protective cover can be raised, enough space is left for operator.

The utility model discloses a hammer head assembly special for an electro-hydraulic hammer, and relates to the technical field of electro-hydraulic hammers. The hammer head assembly special for the electro-hydraulic hammer comprises an electro-hydraulic hammer body, a driving mechanism is assembled on the top of the electro-hydraulic hammer body, and the bottom of the driving mechanism is in transmission connection with a hammer head body; a buffering and damping assembly is arranged on the hammer head body and comprises a fixing frame, a liquid storage bin is formed in the electro-hydraulic hammer body, a filter plate is rotationally connected into the liquid storage bin, a hydraulic bin is assembled on the top of the liquid storage bin, and a transmission rod is slidably connected to the side face of the hydraulic bin. According to the hammer head assembly special for the electro-hydraulic hammer, under the condition that the hammer head body rapidly impacts to generate reverse shock, the hammer head assembly can be correspondingly buffered and damped in cooperation with a fixing frame, a liquid storage bin, a filter plate, a hydraulic bin, a transmission rod, a torsional spring rod, a connecting rod, a friction wheel, a rubber block and an elastic telescopic rod, and the influence on follow-up use of the device is reduced.

The invention discloses a non-magnetic steel precision forging device and a forging process thereof, and particularly relates to the technical field of non-magnetic steel part forging, and the non-magnetic steel precision forging device comprises a base, a forging and pressing mechanism and a clamping mechanism. Through the arrangement of the heavy pressing mechanism, on one hand, when the number of times of forging and pressing reaches a threshold value, impact acceleration can be applied to the first piston piece through the impact piece, the instantaneous forging pressure of the hammer head is increased, heavy hammer machining of non-magnetic steel is achieved, the hydraulic oil flow can be adjusted in a self-adaptive mode, and it is ensured that the pressure of a system is stable when the first piston piece moves in an accelerated mode; and on the other hand, the heavy hammer which can be triggered before and after forging and pressing can compact and homogenize the material and shake off the oxide skin through impact before forging and pressing so as to improve the subsequent forging and pressing quality, and can promote lattice dislocation recombination and recovery of the material through impact after forging and pressing, so that the mechanical property and long-term structure stability of a non-magnetic steel forging and pressing area are remarkably improved.

The invention relates to the technical field of hot heading machining, in particular to a local forming device and technology for shaft rod hot heading machining, and the local forming device comprises a forging table, a rotating wheel disc, a clamping pier head and a vibration pier assembly. The rotating wheel discs are symmetrically arranged relative to the forging table and can synchronously rotate, the clamping pier heads and the vibration pier assemblies are arranged in a one-to-one correspondence mode in the circumferential direction of the rotating wheel discs, and continuous traction and conveying of shaft rod workpieces are achieved through rotation. The clamping pier head is guided by the inclined guide structure to radially clamp the shaft rod workpiece, and is matched with a section mold groove in the end part of the vibration pier assembly to locally form the shaft rod workpiece; the vibration pier assembly generates high-frequency vibration and impact in an electromagnetic driving mode, and vibration hot pier machining is conducted on the shaft rod workpiece in the clamped state. According to the technology, clamping, forming and releasing of the shaft rod workpiece can be completed in the continuous rotating process, dependence on large-tonnage static pressure equipment is reduced, the local forming efficiency is improved, and the technology is suitable for continuous and efficient hot heading machining of the shaft rod type workpiece.

The application discloses a four-column type free forging hydraulic press and belongs to the technical field of magnesium alloy forging equipment. The four-column type free forging hydraulic press comprises a main frame, a placing table, a displacement track, a return oil cylinder, a placing platform, a clamping assembly, a linkage assembly, a hydraulic slide and an oil cylinder. The main frame is installed in the placing platform. The driving assembly is installed on the displacement track. The placing table is drivingly connected to the bottom side of the main frame and the displacement track. The oil cylinders are installed on the upper end of the main frame. The bottom of the oil cylinder penetrates through the bottom surface of the bottom of the main frame. The bottom end of the oil cylinder is connected with the hydraulic slide. The hydraulic slide is drivingly connected to the main frame. The return oil cylinders are arranged in pairs. The top end of the return oil cylinder is connected with the hydraulic slide. The clamping assemblies are arranged in pairs and installed on the upper surface of the bottom of the main frame. The linkage assemblies are arranged in pairs and connected with the side edge of the hydraulic slide. The four-column type free forging hydraulic press can solve the problem of low machining efficiency caused by the fact that the lifting of the upper anvil and the reversing of the workpiece cannot be realized synchronously in the prior art. The forging efficiency and the automation degree are improved.

An electro-hydraulic combined drive electro-hydraulic counter-impact press, comprising a machine body, a motor vertically installed on the upper side of the machine body, a driving gear, a screw rod, a flywheel type gear, a copper nut, a slider type upper hammer head, a boss type lower cylinder cover, an outer ring cylinder body, an outer ring cylinder body cover, an inner ring cylinder body, an inner ring cylinder body cover, an annular cavity formed between the outer ring cylinder body and the inner ring cylinder body, a ring type piston rod installed in the annular cavity and driven by hydraulic pressure, and a lower hammer head sliding along the lower guide rail of the machine body and installed on the top surface of the ring type piston rod. The present application is convenient for continuous forging, has high transmission efficiency, can automatically control the impact energy, ensures the safety of the machine body base, has low cost, long service life, high forging precision, fine grain refinement, high compactness of forged parts, uniform metal organization, good mechanical properties, is not easy to cause internal cracks of forged parts, and has good forming quality of forged parts. It can be widely applied to the forging forming process, and is especially suitable for the forming process of large forged parts.